Your connection is not private

Twitter and some other pages keep me showing this problem on Chrome, meanwhile in Firefox they open perfectly!
Any idea how to fix it?

Answer #1
click advanced and post that image. what is happening? the site you think you are going to is not twitter.com and the security certificate does not match.
Answer #2
I click on advanced but nothing happens, looks like and invalide option to click in
Answer #3
http://www.youtube.com/watch?v=S7i-NBhHXSE
Google IS your friend — really
Answer #4
http://www.youtube.com/watch?v=S7i-NBhHXSE
Google IS your friend -- really
at me isn’t working this method?